another member of president obama's cabinet calling it quit. in a few hours ken salazar is expected to announce he'll step down as interior secretary. salazar came under fire for pushing oil regulations for oil development. he said he'll leave by the end of march. >>> overnight two of japan's biggest airlines grounded their dream liners for safety checks. this after another one was forced to land because of a burning smell in the cockpit. the latest blow for the new jet following a battery fire and two fuel leaks last week. fortunately no one has been hurt in any of these incidents. not good news for the plane. >>> turns out the best medicine for modern health could be the barn. a study found families on farms are almost half as likely to have asthma and nearly four times less likely to have hay fever. but you don't need a pet pig to combat sickness. another new study suggests babies raised around dogs are 31% more likely to be healthy. researchers believe dogs and cats help kids' immune systems mature faster. that's interesting. >>steve: in ou